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Does the 360 have a favorite spark plug? I know my 4.2 likes the Champion RC8YC4's...
 

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My 304 has always like the ACDelco. I'll have to check what model number.
 

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Yeap, despite having it drummed into my head for the 15 years by my dad "AC plugs ain't worth a @#$%!"... I follow Rich's lead and run the plugs the factory sent it out the door with... AC's
 
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